linux-kernel - [PATCH 5/5] ASoC: tas2764: Export highpass filter setting

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Date:   Thu, 25 Aug 2022 16:02:41 +0200
From:   Martin Povišer <povik+lin@...ebit.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     navada@...com, shenghao-ding@...com, asyrus@...com,
        raphael-xu@...com,
        Martin Povišer <povik+lin@...ebit.org>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Stephen Kitt <steve@....org>, Dan Murphy <dmurphy@...com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        asahi@...ts.linux.dev
Subject: [PATCH 5/5] ASoC: tas2764: Export highpass filter setting

Expose a control for the setting of 'DC blocker' highpass filter in the
playback path of TAS2764.

Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
---
 sound/soc/codecs/tas2764.c | 10 ++++++++++
 sound/soc/codecs/tas2764.h |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
index e99a46fb503f..51b87a936179 100644
--- a/sound/soc/codecs/tas2764.c
+++ b/sound/soc/codecs/tas2764.c
@@ -593,11 +593,21 @@ static int tas2764_codec_probe(struct snd_soc_component *component)
 static DECLARE_TLV_DB_SCALE(tas2764_digital_tlv, 1100, 50, 0);
 static DECLARE_TLV_DB_SCALE(tas2764_playback_volume, -10050, 50, 1);
 
+static const char * const tas2764_hpf_texts[] = {
+	"Disabled", "2 Hz", "50 Hz", "100 Hz", "200 Hz",
+	"400 Hz", "800 Hz"
+};
+
+static SOC_ENUM_SINGLE_DECL(
+	tas2764_hpf_enum, TAS2764_DC_BLK0,
+	TAS2764_DC_BLK0_HPF_FREQ_PB_SHIFT, tas2764_hpf_texts);
+
 static const struct snd_kcontrol_new tas2764_snd_controls[] = {
 	SOC_SINGLE_TLV("Speaker Volume", TAS2764_DVC, 0,
 		       TAS2764_DVC_MAX, 1, tas2764_playback_volume),
 	SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 1, 0x14, 0,
 		       tas2764_digital_tlv),
+	SOC_ENUM("HPF Corner Frequency", tas2764_hpf_enum),
 };
 
 static const struct snd_soc_component_driver soc_component_driver_tas2764 = {
diff --git a/sound/soc/codecs/tas2764.h b/sound/soc/codecs/tas2764.h
index 960b337ed0fc..168af772a898 100644
--- a/sound/soc/codecs/tas2764.h
+++ b/sound/soc/codecs/tas2764.h
@@ -33,6 +33,10 @@
 #define TAS2764_VSENSE_POWER_EN		3
 #define TAS2764_ISENSE_POWER_EN		4
 
+/* DC Blocker Control */
+#define TAS2764_DC_BLK0			TAS2764_REG(0x0, 0x04)
+#define TAS2764_DC_BLK0_HPF_FREQ_PB_SHIFT  0
+
 /* Digital Volume Control */
 #define TAS2764_DVC	TAS2764_REG(0X0, 0x1a)
 #define TAS2764_DVC_MAX	0xc9
-- 
2.33.0